2015305 has 4 divisors (see below), whose sum is σ = 2418372. Its totient is φ = 1612240.

The previous prime is 2015303. The next prime is 2015309. The reversal of 2015305 is 5035102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1420864 + 594441 = 1192^2 + 771^2 .

It is not a de Polignac number, because 2015305 - 2¹ = 2015303 is a prime.

It is a super-2 number, since 2×2015305² = 8122908486050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201526 + ... + 201535.

It is an arithmetic number, because the mean of its divisors is an integer number (604593).

2^2015305 is an apocalyptic number.

It is an amenable number.

2015305 is a deficient number, since it is larger than the sum of its proper divisors (403067).

2015305 is an equidigital number, since it uses as much as digits as its factorization.

2015305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403066.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 2015305 is about 1419.6143842607. The cubic root of 2015305 is about 126.3126735190.

The spelling of 2015305 in words is "two million, fifteen thousand, three hundred five".